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| Mirrors > Home > ILE Home > Th. List > enrer | GIF version | ||
| Description: The equivalence relation for signed reals is an equivalence relation. Proposition 9-4.1 of [Gleason] p. 126. (Contributed by NM, 3-Sep-1995.) (Revised by Mario Carneiro, 6-Jul-2015.) |
| Ref | Expression |
|---|---|
| enrer | ⊢ ~R Er (P × P) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-enr 8057 | . 2 ⊢ ~R = {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ (P × P) ∧ 𝑦 ∈ (P × P)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = 〈𝑧, 𝑤〉 ∧ 𝑦 = 〈𝑣, 𝑢〉) ∧ (𝑧 +P 𝑢) = (𝑤 +P 𝑣)))} | |
| 2 | addcomprg 7909 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P) → (𝑥 +P 𝑦) = (𝑦 +P 𝑥)) | |
| 3 | addclpr 7868 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P) → (𝑥 +P 𝑦) ∈ P) | |
| 4 | addassprg 7910 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P ∧ 𝑧 ∈ P) → ((𝑥 +P 𝑦) +P 𝑧) = (𝑥 +P (𝑦 +P 𝑧))) | |
| 5 | addcanprg 7947 | . 2 ⊢ ((𝑥 ∈ P ∧ 𝑦 ∈ P ∧ 𝑧 ∈ P) → ((𝑥 +P 𝑦) = (𝑥 +P 𝑧) → 𝑦 = 𝑧)) | |
| 6 | 1, 2, 3, 4, 5 | ecopoverg 6883 | 1 ⊢ ~R Er (P × P) |
| Colors of variables: wff set class |
| Syntax hints: × cxp 4752 Er wer 6777 Pcnp 7622 +P cpp 7624 ~R cer 7627 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-nul 4241 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-iinf 4715 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-tr 4214 df-eprel 4415 df-id 4419 df-po 4422 df-iso 4423 df-iord 4492 df-on 4494 df-suc 4497 df-iom 4718 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-ov 6061 df-oprab 6062 df-mpo 6063 df-1st 6347 df-2nd 6348 df-recs 6549 df-irdg 6614 df-1o 6660 df-2o 6661 df-oadd 6664 df-omul 6665 df-er 6780 df-ec 6782 df-qs 6786 df-ni 7635 df-pli 7636 df-mi 7637 df-lti 7638 df-plpq 7675 df-mpq 7676 df-enq 7678 df-nqqs 7679 df-plqqs 7680 df-mqqs 7681 df-1nqqs 7682 df-rq 7683 df-ltnqqs 7684 df-enq0 7755 df-nq0 7756 df-0nq0 7757 df-plq0 7758 df-mq0 7759 df-inp 7797 df-iplp 7799 df-enr 8057 |
| This theorem is referenced by: enreceq 8067 prsrlem1 8073 addsrmo 8074 mulsrmo 8075 ltsrprg 8078 gt0srpr 8079 0nsr 8080 axcnex 8190 |
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